Laserfiche WebLink
TETRA TECH <br />Table 3 <br />e. r.uaa.. A..e1-1. Dne.,l?o <br />Ms. Anne Best Johnson AICP <br />October 27, 2010 <br />Page 4 <br />Secdon Distance to Nearest <br />Permanent Structure Factors of Safety <br />Gas Well A 100 1.5 <br />•0as Well B 100 1.5 <br />Oas Well C 100 1.5 <br />Oas Separator 80 1.3 <br />Gas Storage Tank 100 1.3 <br />Gas Operations Access Road 50 1.1 <br />Gas Lines 50 IT <br />Communication Tower <br />Facilities and Access Road 60 1 1 l <br />Communication Tower <br />Telephone Line 80 1.31 <br />Electric Lines 105 1.6 <br />Fences 40 1.0 <br />Iverson Residence 145 2.1 <br />Miscellaneous Out Buildings 12S 1.7 <br />Poudre River Trail 140 2.1 <br />Boyd Freeman Ditch 90 1.4 <br /> <br />- umy Inc erosest structure rocouon to u,c prapvaw unuc ..6-? <br />The minimum setbacks are equal to the distances in the table above, All FOS are 1.0 or greater. Mining, <br />following these minimum setbacks, should not pose a hazard to nearby structures. <br />W flTATIQNS <br />Our review is based on regional geologic mapping, present mining plans, exploratory boring data, known structure <br />locations, and stability analyses using typical soil strength parameters. Should the mining plans change, <br />subsurface conditions vary or structure locations differ from those portrayed in this letter, we should be contacted <br />in order to re-evaluate the potential affects on man-made structures. <br />Please call with any questions or comments that you might have. <br />Sincerely, <br />TETRA TECH <br />`7eremy Deuto, P.G. <br />Engineering Geologist <br />JD:em <br />Gay Linden, R.G. <br />Project Manager <br />Attachments: Figure 1 <br />Attachment A <br />Attachment B <br />P 215%1 W-731111-10002 Dehversbla DRMAApplteal,on PacMegt Stability Exhibit lvc(wn $ubitityAns".s l<ner 162S-I6doc